Symptoms of influenza A

summary

Influenza A virus is a common influenza virus. Influenza A virus is most likely to mutate. Subtype of influenza A virus is known as "avian influenza". Bird flu is an acute infectious disease caused by avian influenza virus. The virus gene mutation can infect human. What are the symptoms of influenza A? Let's talk about it

Symptoms of influenza A

Generally speaking, only about 50% of infected patients will develop typical clinical symptoms of influenza. The typical symptoms of influenza are sudden fever, dizziness, headache, myalgia, mild systemic symptoms, accompanied by sore throat and cough, nasal congestion, runny nose, chest pain, eye pain, photophobia and other symptoms. The fever temperature can reach 39-40 ℃, which generally lasts for 2-3 days and then gradually subsides. Generally, the systemic symptoms are serious, but the respiratory symptoms are not serious.

The most common complication is pneumonia. In general, secondary bacterial pneumonia is more common, with Staphylococcus aureus, pneumococcus and Haemophilus as the most common. Primary influenza virus pneumonia is rare, more common in patients with original heart and lung disease (especially patients with rheumatic heart disease, mitral stenosis) or pregnant women, with high mortality.

Other complications included Reye's syndrome and toxic shock syndrome. Reye's syndrome is limited to children aged 2-16 years old, mainly associated with influenza B (or varicella, herpes zoster). Clinical symptoms of nervous system, such as nausea, vomiting, drowsiness, coma, convulsion, etc., developed into coma after a few days of acute respiratory tract infection. In recent years, it is believed that aspirin is related to the development of coma. Septic shock syndrome often occurs after influenza, accompanied by respiratory failure. Chest X-ray can show adult respiratory distress syndrome, but pneumonia is not obvious. The antibody against influenza could be increased in blood, and pathogenic bacteria could be found in tracheal secretions, especially staphylococcus aureus.

matters needing attention

Pay attention to maintain personal hygiene, develop good personal hygiene habits, wash hands frequently, bathe frequently, do not share towels, cups and other daily necessities, do not spit everywhere, in order to prevent contact with the spread of influenza virus. Daily diet should pay attention to balanced nutrition, regular quantitative, drink more water, do not smoke, less alcohol. At the same time to ensure adequate sleep, avoid overwork.